ASIN (Amazon Standard Identification Number)
An ASIN is the unique 10-character alphanumeric code Amazon assigns to every product in its catalog. Each product page — regardless of who sells it — is tied to one ASIN, which Amazon uses to organize its catalog, search index, and reporting.
How ASINs Work
- When a seller creates a new listing with a valid UPC, EAN, or GTIN, Amazon generates an ASIN.
- All sellers offering that product share the same ASIN.
- Books reuse their ISBN as the ASIN.
- Product variations — size, color, flavor — sit under a parent ASIN with individual child ASINs.
- ASINs remain permanent for the product’s lifetime.
Where You Find and Use an ASIN
| Location | Purpose |
|---|---|
| Product detail page URL | The 10 characters after /dp/ |
| Seller Central inventory | Manage stock, offers, and pricing |
| Advertising campaigns | Target specific products or ASIN groups |
| Brand Analytics reports | Analyze catalog and competitor performance |
| Third-party tools | Track competitors, rankings, and reviews |
How SellerSonar Helps
- Product Monitoring tracks every change on any ASIN — yours or a competitor’s.
- Ranking Monitoring watches keyword and BSR position for each ASIN.
- The Chrome Extension surfaces ASIN-level data as you browse Amazon.
Start a free 14-day trial and monitor your first 5 ASINs on us.